12520145 has 16 divisors (see below), whose sum is σ = 17254080. Its totient is φ = 8625600.

The previous prime is 12520127. The next prime is 12520159. The reversal of 12520145 is 54102521.

It is not a de Polignac number, because 12520145 - 2²⁰ = 11471569 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4946 + ... + 7035.

It is an arithmetic number, because the mean of its divisors is an integer number (1078380).

Almost surely, 2^12520145 is an apocalyptic number.

It is an amenable number.

12520145 is a deficient number, since it is larger than the sum of its proper divisors (4733935).

12520145 is a wasteful number, since it uses less digits than its factorization.

12520145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12016.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 12520145 is about 3538.3816922429. The cubic root of 12520145 is about 232.2040478422.

Adding to 12520145 its reverse (54102521), we get a palindrome (66622666).

The spelling of 12520145 in words is "twelve million, five hundred twenty thousand, one hundred forty-five".